This is a continuation of the iOS Multitasking series. Along with notifications (as discussed last week), iOS Multitasking also provides a feature called Background Audio. As the name suggests, this feature enables applications to play audio even when the application is in the background, similar to how the iPod or Music Application bundled with the device works.

In this tutorial we will be covering playing a sound in the background, not how to record audio in the background. To demonstrate we will be making a simple noise maker and give it the ability to play in the background.